Robotic arm of an automated pipetting system

A robotic arm (100) of an automated pipetting system comprising:

• a pipetting tip adapter (90) and
• a switch to detect the presence of pipetting tips (120) on said pipetting tip adapter (90),
• characterized in that
• the switch is a slide switch (10) comprising:
• a first support member (21) and a second support member (22) configured to slide relative to one another between first and second positions along a movement axis (110),
• an electrically conducting contact pad (30) arranged on said first support member (21), and
• an electrically conducting terminal (40) physically attached to said second support member (22) in physical contact with said contact pad (30) when said support members (21,22) are in the first position, whereas
• said terminal (40) is a first resilient and inherently stable wiping member (41) expanding along said movement axis (110),
• and said first wiping member (41) is not in physical contact with said contact pad (30) when said support members (21,22) are in the second position,
• and an electric current can flow between said first wiping member (41) and said contact pad (30) when said support members (21,22) are in the first position, and said electric current between said wiping member (41) and said contact pad (30) is disrupted when said support members (21,22) are in the second position.